Friction-clutch.



No. 860,096. PATENTED JULY 16, 1907. 0. JOHANSSO'N.

FRIGTIO-N CLUTCH. APPLICATION FILED rim. 23, 1901.

2 SHEETS-SHEET 1.

' Wit/16066.3

5 "draws PETERS (50., WASHINGTON, o. r:

PATENTED JULY 16, 1907.

0. A. JOHANSSON.

FRICTION CLUTCH.

" I ,APPLIOATION rum) FEB.23.1907.

\ 2 SHEETS-SHEET '2.

OLOF AUGUST JOHANSSON, OF KARLSHAMN, SWEDEN.

FRICTION-CLUTCH;

Specification of Letters Patent.

Patented July 16, 1907;

Application filed February 23, 1907. Serial No, 358,793.

To all whom it may concern:

Be it known that I, Own AUGUST JOHANSSON, a subject of the King ofSweden, and a resident of Karlshamn, Sweden, have invented new anduseful Im-.

provements in Friction-Clutches, of which the following is aspecification,reference being had to the drawing accompanying andforming apart hereof.

This invention relates to the kind of clutches for conveying rotarymotion known as expanding-ring friction clutches, i. e. to frictionclutches of the kind having a split expanding-ring placed in the oneclutch part, or member, and adapted to partake in the move' ment of theother clutch part, or member, said expand ing-ring being actuated by awedge operating to throw the expanding ring into engagement with thefirst clutch part for tightening the clutch. These friction clutcheshave the advantage that the driving member of the clutch automaticallytightens the expandingring as long as any relative movement existsbetween the driving member and the driven one. As soon as this relativemovement ceases, i. e. the driven member has reached the same speed ofrotation as the driving member, the expanding of the ring ceases so thatunnecessary hard tightening is av0ided,-at the same time as any slippingis obviated.

The object. of the invention is to so arrange the clutch as to make itpossible to easily and reliably connect or disconnect the clutch parts.

The invention consists, chiefly, in that the connection or disconnectionof the clutch parts is performed by a lever pivotally attached to theone clutch part in such a manner as to be able to swing in two differentplanes, said lever being adapted to be engaged by the other clutchpartand, thereby, caused to act upon the tightening wedge through theintermedium of a toggle-joint or other means.

In the drawings, ,1 have illustrated, by way of example, two forms ofexpanding-ring friction clutches embodying my invention.

Figures 1 and 2 show the one form in elevation and section respectively.Figs. 3 and 4 are corresponding views of the second form of the clutch.

Referring to the drawings, the shaft 1 carries a cupor shell-shaped.part 2 secured to the shaft and forming one member of the clutch (saidcup or shell having, for the sake of clearness, been removed in Figs. 1and 3). The split, elastic expanding-ring 3 is caused, by a lug orprojection from the cup or shell 2, to partake in the movement of thelatter. .Iournaled in the cup or shell 2 is a bolt or the liked, andpivotally attached to the said bolt is a lever 5. In the two formsillustrated the lever 5 is carried by a pin 6 inserted through the bolt4, at right angles thereto, but the invention is, obviously, not limitedto this particular construction as it can be modified in details, onlythe lever 5 is adapted to turn in two different planes. Attached to the'bolt 4 is a small arm or cam 7 forming together with the link 8 atoggle-joint acting upon the wedge 9. The latter is placed, in anywell-known manner, between a the obliquely cut ends of the split ring 3so as to be able to widen the latter and tighten it against the outershell 10 loosely mounted around the inner one 2, said outer cup or shellbeing thought, in the forms illustrated, to be the driving part. The"movement can, however, also be transmitted from the shaft 1 to the cupor shell 10. The latter is shown to form a pulley and is provided, atthe side adjacent to the lever 5, with lugs 11, or the like, adapted toengagethe lever so as to cause the latter to partake in the revolutionof the shell 10 in the direction'of the arrows (Figs. 1 and 3). Theleveris thus. caused to turn about the axis of the bolt 4 so that itsfree end moves to the left (Figs. 1 and 3), whereby the toggle-joint 7,8 causes the wedge to expand the ring 3 so that the latter is tightenedagainst the cup or shell 10 and causes the shell 2 to partake in therevolution.

In order to easily engage or disengage the lever 5 the latter isprovided with an arm 12 entering between the, shanks of a fork 14attached to a sleeve 13 or the like slidably mounted on the shaft 1.parts are to be thrown into engagement, the sleeve 13' is moved by afork or the like (not shown) toward the clutch, whereby the lever 5 iscaught by one of the lugs 11 and turned in the direction of the arrow soas to expand the ring 3. As soon as the friction has grown sufficientlyhigh to cause the drivenpart to partake in the revolution, the lever 5ceases to move relatively to the shell 2, and the degree of tighteningof the expanding ring will thus regulate itself according to the torque.At the least sliding between the ring 3 and the shell 10 the former isimmediately tightened harder and the transmission of motion is thusfully reliable. When the lever 5 is disengaged from the shell 10, it isbrought back by the ring 3 into its original position.

i In order to cause the sleeve 13 to partake in the revolution of theshell 2, the fork 14 is provided with a pin 16 passing through acorresponding aperture in the cup or shell 2. p

The form of construction illustrated in Figs. 3 and 4 differs from thatshown in Figs. 1 and 2 only in that the lever 51s placed within theshell 10 (between the two clutch parts 2 and 10) so as to be totallyhidden. The bolt4 here extends inwardly. The lugs 11 cooperating withthe lever 5 are carried by a ring 15 attached to the inside of the planeend-wall of the shell 10. For engaging or disengaging the lever alsohere a longitudinally movable sleeve 13 is used, said sleeve carrying abolt or pin 16 forming, at its inner end, a fork 14 engaging thelever-arm 12.

In order to make it possible to regulate the action of the wedge 9 uponthe expanding-ring 3 (for instance to adjust for wear) a part 17 isadjustably attached to the When the clutch ring 3, at the one side ofthe wedge, suitably by a screw or the like.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent is 1. The combination with a friction clutchhaving a split ring adapted to partake in the revolution of the oneclutch part, and a wedge adapted to expand the said ring and, thereby,tighten it against the other clutch part, of a lever carried by thefirst clutch part in such a manner as to be able to swing in differentplanes, said lever being engaged by the other clutch part, when it isswung in one plane into operative position, and means interposed betweenthe lever and the wedge for causing the latter to expand the ring, whenthe lever is turned, by the said clutch part, in another plane,substantially as and for the purpose set forth.

2. The combination with a friction clutch having a split ring adapted topartake in the revolution of the one clutch part, and a wedge adapted toexpand the said ring and, thereby, tighten it against the other clutchpart, of a lever mounted in the first clutch part in such a manner as tobe able to swing in different planes, lugs carried by the other clutchpart, said lugs being adapted to engage the said lever, when the latteris swung in one plane into operative position, and means interposedbetween the lever and the wedge for causing the latter to expand thering, when the lever is turned by a lug in another plane, substantiallyas and for the .purpose set forth. I

The combination with a friction clutch having a split ring adapted topartake in the revolution of the one clutch part, and a wedge adapted toexpand the said ring and,

thereby, tighten it against the other clutch part, of a lever mounted inthe first clutch part in such a manner as to be able to swing indiiferent planes, lugs carried by the other clutch part, said lugs beingadapted to engage the said lever when the latter is swung in one planeinto operative position, and a toggle-joint interposed between the leverand the wedge for.causing the latter to expand the ring, when the leveris turned by a lug in another plane, substantially as and for thepurpose set forth.

4. The combination with a friction clutch having a split ring adapted topartake in the revolution of the one clutch part, and a wedge adapted toexpand the said ring and, thereby, tighten it against the other clutchpart, of a bolt mounted in the first clutch part in such a manner as tobe able to turn about its longitudinal axis, a lever pivotally attachedto the said bolt in such a mnner as to be able to swing about an axis atright angles to the longitudinal axis of the bolt, an armextending fromthe said lever, a clutch operating device engaging the said arm, saidclutch operating device being slidably mounted on the shaft carrying theone clutch part so as to be able to swing the lever relatively to thebolt, lugs carried by the other clutch part, said lugs being adapted toengage the said lever, when it is swung, by the clutch operating device,into operative position, and a toggle-joint interposed between the leverand the wedge for causing the latter to expand the ring, when the boltcarrying lever is turned by such a lug, substantially as and for thepurpose set forth.

5. The combination with a friction clutch having a split ring adapted topartake in the revolution of the one clutch part, and a wedge adapted toexpand the said ring and, thereby, tighten it against theother clutchpart, of a lever carried by the first clutch part in such a manner as tobe able to swing in different planes, said lever being engaged by theother clutch part, when it is swung in one plane into operativeposition, means interposed between the lever and the wedge for causingthe latter to expand the ring, when the lever is turned, by the saidclutch part, in another plane, and means for adjusting the length of theexpanding ring, substantially as and for the purpose set forth.

6. In a friction clutch the combination with the clutch parts, of asplit ring adapted to partake in therevolution of the one clutch part, awedge adapted to expand the said ring and, thereby, tighten it againstthe other clutch part, a lever mounted in the first clutch part in sucha manner as to be able to swing in different planes, lugs carried by theother clutch part, said lugs being adapted to engage the said lever,when the latter is swung in one plane into operative position, atoggle-joint interposed between the lever and the wedge for causing thelatter to expand the ring, when the lever is turned by a lug in anotherplane, and means for adjusting the length of the expanding ring,substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

OLOF AUGUST .TOHANSSON.

Witnesses:

C. VELANDEX,

, KARL Axmmsson.

